While rabid Democrats charge Republicans with racism and rabid Republicans do the same to Democrats, the least partisan people and therefore most independent are really the most likely to use race as a criterion, according to a new survey. While a Republican candidate outraged the opposition by stating 47% were going to vote Democrat no matter what, voting history shows that is largely true on both sides. That 6% of swing voters might be a problem for President Obama, if the survey results are accurate.

An online study of eligible voters around the country revealed that the preference for whites over blacks is the strongest in the least politically-partisan voters. Among such voters, race biases against President Obama could produce as much as a 20 percent gap in the popular vote in a contest that would otherwise be equal. Over 8,000 eligible voters participated in University of Washington psychology professor Anthony Greenwald's latest online survey, collected from July through September. Eighty percent of the respondents were white, approximating the electorate, but because the sample had a substantial majority of 'liberals' it was not representative of the American electorate. "Although they may not determine the election outcome, race biases are having a strong anti-Obama effect among the least politically partisan voters," said Greenwald in a statement. "If present pre-election polling is accurate, the effect of racial attitudes will have their effect on Barack Obama's winning margin but not on the election outcome."

Most recent polls show Pres. Obama in the lead, which suggests that if race biases are a "hill he has to climb, the polls indicate that he's actually climbing it," Greenwald said. "People who have race biases against Obama may still believe he's preferable to Mitt Romney for other reasons, and so race attitudes do not appear to be potent enough to overcome the other sources of favorability for Obama."

So to non-partisan, mostly liberal survey takers being a black man is only better than being a Mormon. Faint praise.

The study included the Implicit Association Test to measure implicit racial attitudes, which is a controversial way to detect preferences that people may not realize they have. In the past 10 years, various adaptations of the tool have claimed unconscious attitudes about race, gender, sexuality, ethnicities and other topics. In addition to implicit and self-reported measures on race attitudes and demographic characteristics, Greenwald included various measures of political beliefs, including stances on policy issues such as taxes on the wealthy, immigration and health care.

In his sample of voters, Greenwald found that 25 percent of the most ideologically polarized voters appeared to be already settled on their preferred candidate. In this group, race attitudes appeared to influence votes for only about 2.4 percent of participants.

"These people strongly favor one candidate over another, and race attitudes have only a relatively small effect on their vote," Greenwald said.

But then he took a closer look at the race attitudes for the 25 percent who were least polarized — having no strong affiliations with either political party. The research showed that race attitudes were influencing the choice of candidate for nearly 10 percent of these voters. If 10 percent of voters switched their vote for or against a candidate, that would cause an increase of 20 percent in the gap between candidates.

"Our method was like putting a magnifying glass on the distribution of voters, allowing us a close-up look at various segments," Greenwald said. Those at the far ends strongly favoring Obama or Romney were relatively little affected by racial attitudes. But those closer to the middle of the distribution showed a considerably greater influence of racial biases.

Greenwald points out that any Democratic presidential candidate, including white ones, faces a race attitude handicap. This is because voters with white racial preferences are typically opposed to social and economic policies favored by national Democratic nominees.

Greenwald's findings are consistent with data he released in May, showing that voters' race attitudes leading up to the Republican primary already had a more pronounced role in predicting their vote than in the 2008 presidential contest.

He will continue to collect survey data as part of the year-long Decision 2012 IAT project. Data collected through October will be used to determine whether race attitudes still have as large of an effect on undecided voters.